1 files changed, 0 insertions, 34 deletions
diff --git a/sqlglot/optimizer/expand_laterals.py b/sqlglot/optimizer/expand_laterals.py
deleted file mode 100644
index 5b2f706..0000000
--- a/sqlglot/optimizer/expand_laterals.py
+++ /dev/null
@@ -1,34 +0,0 @@
-from __future__ import annotations
-
-import typing as t
-
-from sqlglot import exp
-
-
-def expand_laterals(expression: exp.Expression) -> exp.Expression:
-    """
-    Expand lateral column alias references.
-
-    This assumes `qualify_columns` as already run.
-
-    Example:
-        >>> import sqlglot
-        >>> sql = "SELECT x.a + 1 AS b, b + 1 AS c FROM x"
-        >>> expression = sqlglot.parse_one(sql)
-        >>> expand_laterals(expression).sql()
-        'SELECT x.a + 1 AS b, x.a + 1 + 1 AS c FROM x'
-
-    Args:
-        expression: expression to optimize
-    Returns:
-        optimized expression
-    """
-    for select in expression.find_all(exp.Select):
-        alias_to_expression: t.Dict[str, exp.Expression] = {}
-        for projection in select.expressions:
-            for column in projection.find_all(exp.Column):
-                if not column.table and column.name in alias_to_expression:
-                    column.replace(alias_to_expression[column.name].copy())
-            if isinstance(projection, exp.Alias):
-                alias_to_expression[projection.alias] = projection.this
-    return expression